public static List <TR> PMap <TI, TR>(this IEnumerable <TI> coll, Func <TI, TR> f)
{
var colllst = coll.ToList();
Interlocked.Add(ref WorkQueue.MaxQueueSize, colllst.Count);
//WorkQueue.CurrentQueueSize = 0;
var remaining_tasks = colllst.Count;
var tasks = coll.Select(i =>
{
var tc = new TaskCompletionSource <TR>();
WorkQueue.QueueTask(() =>
{
try
{
tc.SetResult(f(i));
}
catch (Exception ex)
{
tc.SetException(ex);
}
Interlocked.Increment(ref WorkQueue.CurrentQueueSize);
Interlocked.Decrement(ref remaining_tasks);
WorkQueue.ReportNow();
});
return(tc.Task);
}).ToList();
// To avoid thread starvation, we'll start to help out in the work queue
if (WorkQueue.WorkerThread)
{
while (remaining_tasks > 0)
{
if (WorkQueue.Queue.TryTake(out var a, 500))
{
a();
}
}
}
if (WorkQueue.CurrentQueueSize == WorkQueue.MaxQueueSize)
{
WorkQueue.MaxQueueSize = 0;
WorkQueue.MaxQueueSize = 0;
}
return(tasks.Select(t =>
{
t.Wait();
if (t.IsFaulted)
{
throw t.Exception;
}
return t.Result;
}).ToList());
}
public static List <TR> PMap <TI, TR>(this IEnumerable <TI> coll, Func <TI, TR> f)
{
var colllst = coll.ToList();
WorkQueue.MaxQueueSize = colllst.Count;
WorkQueue.CurrentQueueSize = 0;
var tasks = coll.Select(i =>
{
TaskCompletionSource <TR> tc = new TaskCompletionSource <TR>();
WorkQueue.QueueTask(() =>
{
try
{
tc.SetResult(f(i));
}
catch (Exception ex)
{
tc.SetException(ex);
}
Interlocked.Increment(ref WorkQueue.CurrentQueueSize);
WorkQueue.ReportNow();
});
return(tc.Task);
}).ToList();
return(tasks.Select(t =>
{
t.Wait();
if (t.IsFaulted)
{
throw t.Exception;
}
return t.Result;
}).ToList());
}
